YOU SAID:

She sells seashells on the seashore. The shells she sells are seashells, I'm sure

INTO JAPANESE

彼女は海岸で貝殻を売っています。彼女が売っている貝殻は貝殻です、きっと

BACK INTO ENGLISH

She is selling shells at the beach. The shell she is selling is a shell, surely

INTO JAPANESE

彼女は浜で貝を売っています。彼女が売っているシェルは確かにシェルです。

BACK INTO ENGLISH

She is selling shellfish at the beach. The shell she is selling is certainly a shell.

INTO JAPANESE

彼女は浜で貝を売っています。彼女が売っているシェルは確かにシェルです。

BACK INTO ENGLISH

She is selling shellfish at the beach. The shell she is selling is certainly a shell.